treewide: remove aliases in nixpkgs

This makes the command ‘nix-env -qa -f. --arg config '{skipAliases =
true;}'’ work in Nixpkgs.

Misc...

- qtikz: use libsForQt5.callPackage

  This ensures we get the right poppler.

- rewrites:

  docbook5_xsl -> docbook_xsl_ns
  docbook_xml_xslt -> docbook_xsl

diffpdf: fixup

pkgs/tools/system/thermald/default.nix

@@ -1,4 +1,5 @@
-{ stdenv, fetchFromGitHub, autoconf, automake, libtool, pkgconfig, dbus_libs, dbus-glib, libxml2 }:
+{ stdenv, fetchFromGitHub, autoconf, automake, libtool
+, pkgconfig, dbus, dbus-glib, libxml2 }:
 
 stdenv.mkDerivation rec {
   name = "thermald-${version}";
@@ -12,12 +13,12 @@ stdenv.mkDerivation rec {
   };
 
   nativeBuildInputs = [ pkgconfig ];
-  buildInputs = [ autoconf automake libtool dbus_libs dbus-glib libxml2 ];
+  buildInputs = [ autoconf automake libtool dbus dbus-glib libxml2 ];
 
   patchPhase = ''sed -e 's/upstartconfdir = \/etc\/init/upstartconfdir = $(out)\/etc\/init/' -i data/Makefile.am'';
 
   preConfigure = ''
-    export PKG_CONFIG_PATH="${dbus_libs.dev}/lib/pkgconfig:$PKG_CONFIG_PATH"
+    export PKG_CONFIG_PATH="${dbus.dev}/lib/pkgconfig:$PKG_CONFIG_PATH"
     ./autogen.sh
   '';